---
title: "Reduction in Term of Imprisonment as a Result of Amended Guideline Range"
citation: "U.S.S.G. § 1B1.10 (2026)"
authority_id: "AUTH-USSG-2026-1B1-10"
authority_type: "guideline"
jurisdiction: "federal_nationwide"
precedential_status: "binding_policy_statement_for_section_3582_c_2"
official_url: "https://www.ussc.gov/guidelines/2026-guidelines-manual/annotated-2026-chapter-1"
url: "https://jason93.com/legal/federal-process/authorities/AUTH-USSG-2026-1B1-10/"
legal_review: "2026-10-31"
license: "CC BY 4.0"
---

# Reduction in Term of Imprisonment as a Result of Amended Guideline Range

## Holding or rule used

- Retroactivity list, amended-range calculation, reduction floors, and discretionary considerations.

## Material limitation

Applies at sentencings on or after Nov. 1, 2026, unless § 1B1.11 and the Ex Post Facto Clause require an earlier edition. Text compared with the 2025 edition; changes in this chapter are limited to Amendments 838, 840, 841, and 843 (91 Fed. Reg. 24,088).

## Source

U.S.S.G. § 1B1.10 (2026): <https://www.ussc.gov/guidelines/2026-guidelines-manual/annotated-2026-chapter-1>


## Used in

- [18 U.S.C. § 3582 — Sentence-Modification Remedy Router](https://jason93.com/legal/federal-process/modules/70-sentence-modification/section-3582-remedy-router.md)
- [Rules 35 and 36 — Sentence Correction, Assistance, Record Error, and Appeals](https://jason93.com/legal/federal-process/modules/70-sentence-modification/rules-35-36-and-modification-appeals.md)